Bobbin



June 29, 1954 J. R. CALDWELL ET AL BOBBIN Filed Jan. 2l, 1949 FIG. 2.

ENTORS CALDWELL L. LAKE Patented June 29, 1954 BOBBIN John R. Caldwell, Hampton, and George L. Lake,

Atlanta, Ga., assignors to Meadows Manufacturing Company, Atlanta, Ga., a corporation of Georgia Application January 21, 1949, Serial No. V71,938

2 Claims. 1

Our invention relates to an improved bobbin construction, and the invention willbe particularly described in relation to a bobbin for an updraft spinning frame, commonlyr known as a throwing frame.

It is an object to provide an improved device of the character indicated.

It is another object to provide an improved bobbin construction wherein continuously smooth surfaces may be presented to the yarn so as t avoid chances of snagging.

It is a further object to provide an improved bobbin construction featuring lightness of weight and complete symmetry of weight distribution about the spinning axis.

It is also an object to provide an improved bobbin construction utilizing plastic materials for all external surfaces likely to come in contact with yarn.

It is a general object to meet the above objects with a sturdy and inexpensively fabricated structure.

Other objects and various further features of the invention will be pointed out or will occur to those skilled in the art from a reading of the following specification in conjunction with the accompanying drawings. In said drawings, which show, for illustrative purposes only, a preferred form of the invention:

Fig. 1 is a vertical sectional view of a bobbin incorporating features of the invention;

Fig. 2 is a partly broken-away top view of the bobbin of Fig. 1;

Fig. 3 is a partly broken-away bottom view of the bobbin of Fig. 1;

Fig. 4 is a vertical sectional view of a modied bobbin construction according to the invention;

Fig. 5 is another vertical sectional view of a further modification; andv Fig. 6 is a fragmentary sectional view of still another arrangement.

Briefly stated, our invention contemplates an improved bobbin construction, wherein two endflange members are centrally circularly formed with parts which are to face each other and which are to fit a tubular member serving to locate and align the end-ange members in a complete assembly. The end-flange members may be of molded plastic construction with mutually facing axially extending circular recesses or with mutually facing cylindrical shank portions, and in one form a plastic tubular member fits over the outer cylindrical surfaces of the shank portions. In another form, the tubular member fits Within cylindrical surfaces on the shank portions, and the shank portions may provide the external surface of the main body of the bobbin. In each case, the tubular member which engages the shank portions may be sufficient to retain the assembly, but in certain cases a further inner tubular member preferably of metal may be provided with abutment lugs or the like to engage each flange member and thus to retain the completed assembly. Such central tubular members may be internally contoured to fit the spindle blade for the particular type of spindle on which the bobbin is to be mounted.

Referring to Figs. 1, 2, and 3 of the drawings, our invention is shown in application to a bobbin comprising two end-flange members I0-II joined by a tubular member I2. The'end-flange members may be of molded plastic construction, as for example rag-filled Bakelite, and may be formed integrally with generally cylindrical shank portions I3-I4. In the form shown, the shank portions I3I4 have outer cylindrical surfaces to flt the inner surface of the tubular member I2, which may also be of plastic construction. For purposes of assuring a non-snagging t at the adjacent external surfaces of the end flanges I--II and of the tubular member I2, I prefer to provide axially extending annular recesses, such as the recess I5 in the end-ange member I0, at the juncture of the flange and shank portions of member Ill. v The recess I5 should be such as closely to receive a slightly axially projecting end of the tubular member I2. It will be clear that when the tubular member I2 is joined to the flange member Il] in the manner indicated, and held as by press-fitting, by cement, or by other means, there will be no cracks or burrs presented to snag the yarn.

The upper flange member I0 may be recessed centrally on its outer face, and in said recess may be inserted a ferrule I6, preferably of metal and including an upper inwardly directed flange or lip I 'I for the guiding support of a flyer ring I8. The ferrule and flange may be considered as an inverted cup with a large hole in the cup bottom to form the flange I'I. Both end-flange members may include central through passages for the accommodation of a spindle, and the size of these passages will of course depend upon the spindle to which the bobbin is to be applied. In a preferred form, however, the lower end of the upper end-flange member I0 includes an outwardly flared internal surface, as at I9, for the more ready non-fouling insertion of the tip of the spindle blade, as will be clear. The lower endflange member Il may be provided with special key-receiving recesses 20 for driving engagement with the spindle, as Will be clear.

In Fig. 4, we show a modied bobbin construction wherein the tubular member 2! joining the two end-flange members 22-23 internally engages the shank portions 24-25 of these endange members. The tubular member 2l ymay be of plastic construction, but in the preferred form shown, a simple metal tube is employed. The outer cylindrical surfaces of the shank portions 24-25 may extend into end-to-end adjacency so as to provide an effectively'continuous-smooth outer contour for the assembly and Vthus topresent no snagging portions for catching'yarn. TIn View of the fact that the outer bobbin surface is defined by the shank portions, .thecylindrical surfaces of these portions may be filleted to the flanges proper, as at '3E-2l, for a smoothouter contour. The described construction may be selfretaining, as by a press-fit assembly, but Ifor greater rigidity we prefer to employ a further tubular member 28 within the tubular member 2l and including abutment means such as radially outwardly turned flange or lug means v29-3'0 lockingly-to engage both end-frange members 22-23. The internal contour of the inner tubularmember 28 is preferably such as `to conform with the spindle upon which the bobbin is `tobe mounted. As in the yfirst described arrangement, the bobbin of Fig. 4 may include a recess-mounted flyer ferrule3l at one end, and suitable keying means 32 at the other end.

In Fig.'5, We show'a further modified construction which generally resembles vthe construction of Fig. 1 and which, therefore,.is shown with many of the same `reference characters. In Fig. `5, an outer tubular member l2 ofplasticmaterialjoins two end-flange members `l0- H by fitting over the outer cylindrical surfaces of the shank -portions l3-I4 thereof. However, for improved retaining `purposes we have additionally provided an internal tubular member 33 which maybe of metal and which preferably includes retainingabutment lugs or the like 341-35 lockingly toengage the two flange members IO-I I. Again, the internal contour of the tubular member 33 -is preferably such as to conform with the particular spindle upon which the bobbin is -to be mounted,

and the end-flange members lil-l I may include a flyer ferrule II and-driving key means 20, respectively.

In Fig. v6, we show still another arrangement wherein the end-flange members are notprovided With shank portions. In the arrangement of Fig. 6 the tubular member which provides the body of the bobbin is fitted at its projecting ends into suitable axially extending annular recesses, such as the recess 31 in the upper end flange 38. The end flangev38 may, therefore, be madefrom'flat stock appropriately stamped and recessed. Such recessing may include provision for insertion of the flyer guide or ferrule 39; and, if desired, the same recess which supports the ferrule 39 may also provide a seat or abutment ledge 40 against which a central retaining tubular member 4I, similar to the tubular membersland 33 `of Figs. 4 and 5,-may engage theiiange 38.

It will be seen that We have described relatively :simple bobbin constructions which need present no snagging ledges or burrs to catch yarns. The bobbin constructions may be mass produced `cheaply and with faithfully reproduced assured 4symmetry of weight distribution about the spin- .-ning'axis. The .use of plastic materials assures complete smoothness of outer surfaces, and the appropriately formed inner contours may assure proper locating engagement with the spindle upon-.which the bobbin may be mounted.

While we have described our invention in detail for the preferred forms shown, it will be understood that modifications may be made withinfthe scope'of the invention as defined-inthe appended claims.

We claim:

1. -In a bobbin'of the character indicated, a pair of end members each comprising a plastic cylindrical plug portion and an integral radial flange, a tubular plastic member concentric with said plug portions and into the ends of which said plug portions t, said end members .having axial bores therethrough to fit over a spindle blade,one of said end members having a converging inner Wall to-guidethe spindle blade-into the bore of that end member, said last mentioned end member at the axially outer side having a counterbore, a metallic cup securely -mounted in said counterbore with the cup bottom at the axially outer side, said cup bottom havinga central aperture of substantially smaller diameter than the cup so as to provide-an undercut space for receiving the hook of a yer ring.

I2. The combination defined in claim 1, in which the other of said end members has an externally opening keyway for receivingakey.

References Cited in the file 0f this patent lUNITED STATES PATENTS Number Name Date 278,673 Van Riper May 29, 1883 427,329 'Kelsea May 6, 1890 602,241 Pendleton Apr. 12, 1898 1,857,599 Mack May 10, 1932 1,901,737 Dunlap Mar. 14, 1937 2,453,247 Moss Nov. 9, 19.48

FOREIGN .PATENTS Number Country Date `I70,219 Germany Aug. 12, 1893 

